EP0836254A4 - Filtre optique, son procede de fabrication et amplificateur optique equipe d'un tel filtre - Google Patents

Filtre optique, son procede de fabrication et amplificateur optique equipe d'un tel filtre

Info

Publication number
EP0836254A4
EP0836254A4 EP97919677A EP97919677A EP0836254A4 EP 0836254 A4 EP0836254 A4 EP 0836254A4 EP 97919677 A EP97919677 A EP 97919677A EP 97919677 A EP97919677 A EP 97919677A EP 0836254 A4 EP0836254 A4 EP 0836254A4
Authority
EP
European Patent Office
Prior art keywords
light
power
input
output power
wavelength
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97919677A
Other languages
German (de)
English (en)
Other versions
EP0836254A1 (fr
EP0836254B1 (fr
Inventor
Masaru Fukushima
Haruki Ogoshi
Hijiri Nimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Furukawa Electric Co Ltd
Original Assignee
Furukawa Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Furukawa Electric Co Ltd filed Critical Furukawa Electric Co Ltd
Publication of EP0836254A1 publication Critical patent/EP0836254A1/fr
Publication of EP0836254A4 publication Critical patent/EP0836254A4/fr
Application granted granted Critical
Publication of EP0836254B1 publication Critical patent/EP0836254B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/29—Repeaters
    • H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
    • H04B10/293—Signal power control
    • H04B10/294—Signal power control in a multiwavelength system, e.g. gain equalisation
    • H04B10/2941—Signal power control in a multiwavelength system, e.g. gain equalisation using an equalising unit, e.g. a filter
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
    • H01S3/10023—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers by functional association of additional optical elements, e.g. filters, gratings, reflectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S2301/00—Functional characteristics
    • H01S2301/06—Gain non-linearity, distortion; Compensation thereof

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Lasers (AREA)
  • Optical Communication System (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

Cette invention concerne un procédé de fabrication d'un filtre optique dont on a supprimé la dépendance du gain par rapport à la longueur d'onde. On fixe la puissance lumineuse du signal d'entrée d'un amplificateur optique (4) ainsi que la puissance de sortie et la puissance lumineuse du signal de sortie d'une source de pompage (8) au niveau de la puissance utilisée au moment de la communication, et l'on fixe la puissance totale de la pseudo lumière d'entrée d'une pluralité de longueurs d'onde? (μ1, μ2, ..., μn) en provenance de sources lumineuses (1a) ainsi que la lumière d'entrée (lumière du capteur) de l'une des longueurs d'onde d'une bande de communication en provenance d'une source lumineuse (1m), au niveau de la puissance totale des signaux d'entrée de communication d'une pluralité de longueurs d'onde au moment de la communication de multiplexage des longueurs d'onde. On détermine ensuite l'atténuation de la lumière d'entrée correspondant à la longueur d'onde de la lumière du capteur en entrant la lumière d'entrée dans l'amplificateur (4) à l'état fixé et en ajustant de manière variable l'atténuation au cours de la transmission de la source de lumière (1m) vers la borne d'entrée (14) de l'amplificateur (4) de telle sorte que la puissance de sortie de la lumière du capteur en provenance de l'amplificateur (4) peut appartenir à une gamme allant de la puissance de sortie maximum de la pseudo puissance de sortie à la puissance de sortie minimum de la puissance de sortie. En répétant l'opération décrite ci-dessus tout en changeant la longueur d'onde de la lumière du capteur, on confère au filtre optique les caractéristiques du spectre des pertes de l'atténuation correspondant à chacune des longueurs d'onde respective.
EP97919677A 1996-04-25 1997-04-24 Filtre optique, son procede de fabrication et amplificateur optique equipe d'un tel filtre Expired - Lifetime EP0836254B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP12908396A JP3895396B2 (ja) 1996-04-25 1996-04-25 光学フィルタの製造方法
JP129083/96 1996-04-25
PCT/JP1997/001431 WO1997040559A1 (fr) 1996-04-25 1997-04-24 Filtre optique, son procede de fabrication et amplificateur optique equipe d'un tel filtre

Publications (3)

Publication Number Publication Date
EP0836254A1 EP0836254A1 (fr) 1998-04-15
EP0836254A4 true EP0836254A4 (fr) 2001-04-04
EP0836254B1 EP0836254B1 (fr) 2006-06-07

Family

ID=33307392

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97919677A Expired - Lifetime EP0836254B1 (fr) 1996-04-25 1997-04-24 Filtre optique, son procede de fabrication et amplificateur optique equipe d'un tel filtre

Country Status (3)

Country Link
EP (1) EP0836254B1 (fr)
JP (1) JP3895396B2 (fr)
WO (1) WO1997040559A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6198570B1 (en) * 1996-04-05 2001-03-06 The Furukawa Electric Co., Ltd. Optical filter, manufacturing method thereof, and optical amplifier equipped with said optical filter
JP2000004061A (ja) * 1998-06-15 2000-01-07 Nec Corp 光利得等化装置
US6545799B1 (en) 1998-09-02 2003-04-08 Corning Incorporated Method and apparatus for optical system link control
JP5144561B2 (ja) * 2009-03-03 2013-02-13 日本電信電話株式会社 利得平坦化されたカスケード型光ファイバ増幅器、該増幅器の利得等化器を設計する装置、および、該増幅器の利得等化器を設計する方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04147114A (ja) * 1990-10-09 1992-05-20 Nippon Telegr & Teleph Corp <Ntt> 光レベル等化方法
JPH0675254A (ja) * 1992-08-26 1994-03-18 Nippon Telegr & Teleph Corp <Ntt> 光フィルタ

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
KHALEGHI F ET AL: "Tunable coherent optical transversal EDFA gain equalization", JOURNAL OF LIGHTWAVE TECHNOLOGY, APRIL 1995, USA, vol. 13, no. 4, pages 581 - 587, XP000513573, ISSN: 0733-8724 *
See also references of WO9740559A1 *

Also Published As

Publication number Publication date
JP3895396B2 (ja) 2007-03-22
WO1997040559A1 (fr) 1997-10-30
EP0836254A1 (fr) 1998-04-15
EP0836254B1 (fr) 2006-06-07
JPH09292636A (ja) 1997-11-11

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